package com.bluetrum.utils;

public class HexUtils {

    private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
    public static String bytesToHex(byte[] bytes) {
        if (bytes != null) {
            char[] hexChars = new char[bytes.length * 3];
            for (int j = 0; j < bytes.length; j++) {
                int v = bytes[j] & 0xFF;
                hexChars[j * 3] = HEX_ARRAY[v >>> 4];
                hexChars[j * 3 + 1] = HEX_ARRAY[v & 0x0F];
                hexChars[j * 3 + 2] = ' ';
            }
            return new String(hexChars);
        }
        return "";
    }

}
